linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
To: cezary.rojewski@intel.com, srinivas.kandagatla@linaro.org,
	bgoswami@codeaurora.org, lgirdwood@gmail.com, broonie@kernel.org,
	perex@perex.cz, tiwai@suse.com
Cc: alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
	Jiasheng Jiang <jiasheng@iscas.ac.cn>
Subject: [PATCH] ASoC: codecs: Check for error pointer after calling devm_regmap_init_mmio
Date: Tue, 11 Jan 2022 09:32:15 +0800	[thread overview]
Message-ID: <20220111013215.494516-1-jiasheng@iscas.ac.cn> (raw)

The devm_regmap_init_mmio() may return error pointer under certain
circumstances, for example the possible failure of the kzalloc() in
regmap_mmio_gen_context(), which is called by devm_regmap_init_mmio().
Then the error pointer will be dereferenced.
For example rx->regmap will be used in rx_macro_mclk_enable().
Therefore, it should be better to check it.

Fixes: af3d54b99764 ("ASoC: codecs: lpass-rx-macro: add support for lpass rx macro")
Fixes: c39667ddcfc5 ("ASoC: codecs: lpass-tx-macro: add support for lpass tx macro")
Fixes: 809bcbcecebf ("ASoC: codecs: lpass-wsa-macro: Add support to WSA Macro")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
 sound/soc/codecs/lpass-rx-macro.c  | 2 ++
 sound/soc/codecs/lpass-tx-macro.c  | 2 ++
 sound/soc/codecs/lpass-wsa-macro.c | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/sound/soc/codecs/lpass-rx-macro.c b/sound/soc/codecs/lpass-rx-macro.c
index 07894ec5e7a6..2adbf2e2697f 100644
--- a/sound/soc/codecs/lpass-rx-macro.c
+++ b/sound/soc/codecs/lpass-rx-macro.c
@@ -3542,6 +3542,8 @@ static int rx_macro_probe(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	rx->regmap = devm_regmap_init_mmio(dev, base, &rx_regmap_config);
+	if (IS_ERR(rx->regmap))
+		return PTR_ERR(rx->regmap);
 
 	dev_set_drvdata(dev, rx);
 
diff --git a/sound/soc/codecs/lpass-tx-macro.c b/sound/soc/codecs/lpass-tx-macro.c
index 27a0d5defd27..e4bbc6bd4925 100644
--- a/sound/soc/codecs/lpass-tx-macro.c
+++ b/sound/soc/codecs/lpass-tx-macro.c
@@ -1803,6 +1803,8 @@ static int tx_macro_probe(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	tx->regmap = devm_regmap_init_mmio(dev, base, &tx_regmap_config);
+	if (IS_ERR(tx->regmap))
+		return PTR_ERR(tx->regmap);
 
 	dev_set_drvdata(dev, tx);
 
diff --git a/sound/soc/codecs/lpass-wsa-macro.c b/sound/soc/codecs/lpass-wsa-macro.c
index d3ac318fd6b6..dd1a8b7bc794 100644
--- a/sound/soc/codecs/lpass-wsa-macro.c
+++ b/sound/soc/codecs/lpass-wsa-macro.c
@@ -2405,6 +2405,8 @@ static int wsa_macro_probe(struct platform_device *pdev)
 		return PTR_ERR(base);
 
 	wsa->regmap = devm_regmap_init_mmio(dev, base, &wsa_regmap_config);
+	if (IS_ERR(wsa->regmap))
+		return PTR_ERR(wsa->regmap);
 
 	dev_set_drvdata(dev, wsa);
 
-- 
2.25.1


             reply	other threads:[~2022-01-11  1:32 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-11  1:32 Jiasheng Jiang [this message]
2022-01-12  9:48 ` [PATCH] ASoC: codecs: Check for error pointer after calling devm_regmap_init_mmio Srinivas Kandagatla
2022-01-12 14:20 ` Mark Brown
2022-01-25 10:20 ` Mark Brown

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20220111013215.494516-1-jiasheng@iscas.ac.cn \
    --to=jiasheng@iscas.ac.cn \
    --cc=alsa-devel@alsa-project.org \
    --cc=bgoswami@codeaurora.org \
    --cc=broonie@kernel.org \
    --cc=cezary.rojewski@intel.com \
    --cc=lgirdwood@gmail.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=perex@perex.cz \
    --cc=srinivas.kandagatla@linaro.org \
    --cc=tiwai@suse.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).